BREAKING: Target Test Prep releases Brand New 2026 On Demand GMAT prep course

Redeem

2 x and 6 y?

This topic has expert replies
Post new topic Post Reply
Previous Topic Next Topic
User avatar
GMAT Instructor
Posts: 3650
Joined: Wed Jan 21, 2009 4:27 am
Location: India
Thanked: 267 times
Followed by:80 members
GMAT Score:760

2 x and 6 y?

by sanju09 » Wed Sep 15, 2010 9:25 pm
What is the average (arithmetic mean) of 2 x and 6 y?

[1] x + y = 18.

[2] x + 3 y = 32.



[spoiler]Source: https://readyforgmat.com[/spoiler]
The mind is everything. What you think you become. -Lord Buddha



Sanjeev K Saxena
Quantitative Instructor
The Princeton Review - Manya Abroad
Lucknow-226001

www.manyagroup.com
Top
Source: — Data Sufficiency |

GMAT/MBA Expert

User avatar
GMAT Instructor
Posts: 1179
Joined: Sun Apr 11, 2010 9:07 pm
Location: Milpitas, CA
Thanked: 447 times
Followed by:88 members

by Rahul@gurome » Thu Sep 16, 2010 4:04 am
Average of 2x and 6y = (2x + 6y)/2 = x + 3y

(1) x + y = 18 implies y = 18 - x
So, average of 2x and 6y = x + 3(18 - x), which is an expression in x and we have no info about x.
So, (1) is NOT SUFFICIENT.

(2) x + 3y = 32 implies that average of 2x and 6y = 32
So, (2) is SUFFICIENT.

The correct answer is [spoiler](B)[/spoiler].
Rahul Lakhani
Quant Expert
Gurome, Inc.
https://www.GuroMe.com
On MBA sabbatical (at ISB) for 2011-12 - will stay active as time permits
1-800-566-4043 (USA)
+91-99201 32411 (India)
Top
Post new topic Post Reply
• Page 1 of 1